SR-B5.0250.020-00.030 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-B5.0250.020-00.030 is part of the SR Synchronous Servo Motors series and has a mass of 24 kilograms with a flange size of 190 mm. It features a resolver feedback device with ±10 arcmin precision and 8192 increments per revolution, and offers a protection rating of IP67. The servo motor produces a rated speed of 2000 min-1 and a locked rotor torque of 23 Nm with a torque constant of 2.3 Nm per amp.
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Product Description:
The SR-B5.0250.020-00.030 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. In automated machinery, it converts drive current into tightly regulated shaft motion, supplying the closed-loop velocity and torque needed for pick-and-place axes, tooling heads, or conveyor sections. An integrated resolver reports rotor position directly to the drive controller, enabling high-bandwidth adjustments without external encoders and supporting applications that rely on precise electrical commutation.
The motor reaches a rated speed of 2000 rpm, which is its continuous rotational velocity under nominal load. Its electromagnetic design provides a torque constant of 2.3 Nm/A, so every ampere delivered by the inverter produces 2.3 newton-meters of torque at the shaft. During a stall, the unit can withstand a locked-rotor torque of 23 Nm while drawing a locked-rotor current of 10 A; these limits help establish the protection thresholds for the drive’s current and thermal monitoring circuits. A rotor inertia of 83 × 10⁻⁴ kg·m² moderates acceleration profiles, balancing dynamic responsiveness with load stability. The housing has an IP67 rating, providing full protection against dust and resistance to temporary immersion so the motor can operate on washdown lines or in areas exposed to coolant mist.
The motor has a mass of 24 kg, which must be considered when selecting mounting hardware and supporting the machine frame. Its square flange measures 190 mm and supports alignment with compatible gearboxes. Within the housing, the stator stack extends 300 mm, while the ground shaft measures 32 mm in diameter and 58 mm in length for direct coupling through keyed hubs. Power is routed through a size 1 motor connector and a four-conductor cable with a conductor cross-sectional area of 1.5 mm², helping keep conductor temperature within class limits at continuous current. For position control, the resolver supplies 8192 incremental counts per revolution; this resolution, combined with an electrical precision of ±10 arc-minutes, supports fine interpolation in multi-axis systems.
